W741E20X Datasheet, PDF (71/84 Pages) Winbond – 4-BIT FLASH MICROCONTROLLER

Preliminary W741E20X
Instruction Set Table 2, continued
RRC
R
Rotate Right R with CF
Machine Code:
Machine Cycle:
Operation:
Description:
Flag Affected:
01001101
1 R6 R5 R4 R3 R2 R1 R0
1
ACC.n, R.n ← (R.n+1); ACC.3, R.3 ← CF; CF ← R.0
The contents of the ACC and the data memory location addressed by R6 to
R0 are rotated right one bit, bit 0 is rotated into CF, and CF is rotated into bit
3 (MSB). The same contents are loaded into the ACC.
CF & ZF
RTN
Return from subroutine
Machine Code:
Machine Cycle:
00000001
1
00000000
Operation:
Description:
(PC) ← STACK
The program counter (PC10 to PC0) is restored from the stack. A return
from a subroutine occurs.
SBC R, ACC
Machine Code:
Machine Cycle:
Operation:
Description:
Flag Affected:
Subtract ACC from R with Borrow
0 0001010
0 R6 R5 R4 R3 R2 R1 R0
1
ACC ← (R) - (ACC) - (CF)
The contents of the ACC and CF are binary subtracted from the contents of
the data memory location addressed by R6 to R0 and the result is loaded
into the ACC.
CF & ZF
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Publication Release Date: March 1998
Revision A1